EP0824378B1 - Zentrifugalabscheider - Google Patents

Zentrifugalabscheider Download PDF

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Publication number
EP0824378B1
EP0824378B1 EP96911131A EP96911131A EP0824378B1 EP 0824378 B1 EP0824378 B1 EP 0824378B1 EP 96911131 A EP96911131 A EP 96911131A EP 96911131 A EP96911131 A EP 96911131A EP 0824378 B1 EP0824378 B1 EP 0824378B1
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EP
European Patent Office
Prior art keywords
liquid
separation
rotor
end wall
centrifugal separator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96911131A
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English (en)
French (fr)
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EP0824378A1 (de
Inventor
Rolf Ridderstrale
Klaus Stroucken
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alfa Laval AB
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Alfa Laval AB
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Publication date
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Publication of EP0824378A1 publication Critical patent/EP0824378A1/de
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Publication of EP0824378B1 publication Critical patent/EP0824378B1/de
Anticipated expiration legal-status Critical
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B04—CENTRIFUGAL APPARATUS OR MACHINES FOR CARRYING-OUT PHYSICAL OR CHEMICAL PROCESSES
    • B04B—CENTRIFUGES
    • B04B1/00—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles
    • B04B1/04—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls
    • B04B1/08—Centrifuges with rotary bowls provided with solid jackets for separating predominantly liquid mixtures with or without solid particles with inserted separating walls of conical shape

Definitions

  • the present invention relates to a centrifugal separator which is particularly designed for freeing a liquid, e.g. water, from both suspended light particles, e.g. oil drops, having a smaller density than the liquid, and suspended heavy particles, e.g. solids, having a larger density than the liquid.
  • a liquid e.g. water
  • suspended light particles e.g. oil drops
  • suspended heavy particles e.g. solids
  • a starting point for the invention has been a centrifugal separator, which has a rotor for rotation around a centre axis extending through the rotor and in which
  • a centrifugal separator of this kind known for instance from SE-19 666 and SE-21 885 (both granted in 1904), has certain advantages over other centrifugal separators.
  • One advantage lies in the fact that liquid to be treated in the centrifugal separator is introduced into the separation chamber of the rotor at the rotor end wall faced by the apex portion of the separation discs. This makes possible an effective use from a separation point of view of said inlet channels, which extend between the central inlet of the rotor and the so called distribution channels in the stack of separation discs.
  • the pre-separation of the liquid obtained in the inlet channels may be used to a maximum, i.e. the result of this pre-separation is not spoiled by an undesired cross-flow of the part flows of the liquid, which are obtained through the pre-separation, when this liquid is conducted further into said distribution channels.
  • a cross-flow of this kind would be obtained, however, if the liquid would be conducted into the distribution channels at the opposite end of the separation disc stack after having flowed through corresponding inlet channels having the same inclination relative to the central axis in this part of the rotor.
  • centrifugal separator of the described kind Another advantage of a centrifugal separator of the described kind is that liquid conducted into the separation chamber in the above described manner can preferably be supplied to the rotor through the rotor body end wall at which said inlet channels are situated. Thus, the liquid need not be conducted axially through the whole of the rotor before it enters the separation chamber, which most often happens today in centrifugal rotors having frusto-conical separation discs. This is advantageous particularly in connection with rotors having relatively small dimensions and having their respective two end walls kept together axially by means of force uptaking members arranged centrally in the rotor.
  • the object of the present invention has been to improve a centrifugal separator of the kind just described in a way such that it can free the treated liquid from suspended heavy particles even more effectively than has been possible before.
  • the sludge passage may preferably constitute a continuation radially outwardly of the counter pressure chamber and like this be substantially free of rotational entraining members. Thereby, a substantial counter pressure may be obtained against radially outwardly directed liquid flow in the counter pressure chamber for preventing incoming liquid from passing into the separation chamber through the sludge passage. Thus, substantially only separated solids will be conducted from the counter pressure chamber into the separation chamber through the sludge passage.
  • a conical partition is arranged between said first end wall and the stack of separation discs, the counter pressure chamber being formed by and between the conical partition and said first end wall.
  • the conical partition preferably has through openings, through which said inlet channels communicate with said distribution channels.
  • the conical partition extends preferably also radially outside the stack of separation discs and is able, thereby, to delimit also said sludge passage between itself and said first end wall.
  • the outlet channels for separated liquid may be formed by tubular members, but preferably they are constituted by recesses or bores in said conical partition.
  • the conical partition may be composed of two conical discs arranged coaxially somewhat spaced from each other, said outlet channels being delimited between the two conical discs and several wings arranged therebetween and distributed around the rotor axis.
  • a centrifugal separator according to the invention is particularly suitable for separation of relatively small amounts of suspended light and heavy particles from a liquid.
  • the outcoming amount of separated liquid is relatively large compared to the amount of separated liquid light phase.
  • the rotor preferably has both its central inlet and its central first outlet, intended for separated liquid, situated at said first rotor end wall, whereas the central second outlet of the rotor, intended for separated light phase, is situated at said second rotor end wall.
  • the latter end wall therefore, is the one best suited for connection with a drive shaft for the rotation of the rotor.
  • a rotor 1 supported on the top of a rotable drive shaft 2.
  • the rotor has a centre axis R, which coincides with the geometrical axis of the drive shaft 2.
  • a motor (not shown) is arranged for rotation of the drive shaft 2 and, thereby, the rotor 1 around the centre axis R.
  • the rotor 1 further has a rotor body comprising a lower part 3, an upper part 4 and a centre part 5.
  • the lower rotor body part 3 surrounds the drive shaft 2 and is firmly connected therewith.
  • the centre part 5 is connected by means of a bolt 6 with the drive shaft 2 and rests axially against a centre portion of the lower rotor part 3.
  • the ring 7 is also arranged to press the upper rotor body part 4 axially against a radially outer portion of the lower rotor body part 3. In this way the rotor body parts 3 and 4 are kept axially pressed together and firmly connected with the drive shaft 2.
  • the rotor body delimits a separation chamber 9 surrounding the axis R.
  • the upper rotor body part 4 forms a first end wall 10 and a surrounding wall 11.
  • the lower rotor body part 3 forms a second end wall 12.
  • the separation chamber 9 there is mounted for rotation with the rotor body a stack of frusto conical separation discs 13 arranged at small axial distances from each other. Spacing members (not shown) are arranged between adjacent separation discs 13 and serve as entrainment members in the spaces between the separation discs.
  • the centre part 5 is surrounded by a sleeve 14 situated radially inside the stack of separation discs 13.
  • the separation discs 13 have radially outer edges and radially inner edges, and between the latter and the sleeve 14 a flow space 15 is defined.
  • a channel 16 which at its upper end communicates with the flow space 15 and at its lower end communicates with a radially extending channel 17.
  • the channel 17 communicates at its radially outer end with the lower part of the separation chamber 9 and at its radially inner end with a central outlet of the rotor in the form of an overflow outlet 18.
  • Several channels 16 and 17 may be present, distributed around the axis R.
  • the sleeve 14 is connected with a frusto conical disc forming a partition 19 within the rotor body.
  • the partition 19 situated axially between the stack of separation discs and the upper end wall 10 of the rotor has several through openings 20 distributed around the axis R and situated axially aligned with corresponding through openings in the separation discs 13.
  • the openings through the separation discs form several parallel so called distribution channels 21, which communicate with the interspaces between the separation discs 13 and, at their ends closest to the end wall 10, with an annular space 22 situated between this end wall 10 and the partition 19.
  • the distribution channels 21 are situated substantially closer to the outer edges of the separation discs 13 than to the inner edges thereof.
  • the space 22 extends without interruption around the rotor axis R, and the end wall 10 as well as the partition 19 are free of protuberances or other rotational entraining members in the area of the space 22.
  • the rotor spacing members may be arranged between the radially outermost part of the partition 19 and the end wall 10.
  • the partition 19 On its upper side the partition 19 carries along its radially innermost portion several radially extending wings, which together with the partition 19 and an upper portion of the centre part 5 delimit several inlet channels 23.
  • said wings and, thus, the inlet channels 23 extend radially outwardly to a level through the openings 20 in the partition 19.
  • the central receiving chamber 24 is delimited by the upper portions of the central part 5 and the conical partition 19, respectively, and an annular further partition 25. Above the partition 25 there is delimited between this and the cover 8 an outlet chamber 26.
  • outlet channels 27 extend from the separation chamber 9 at a level radially outside the stack of separation discs to a corresponding number of short axially extending pipes 28, which are connected with the central portion of the partition 19.
  • the pipes 28 extend through the centre part 5 and the annular partition 25 and open into the outlet chamber 26.
  • annular so called gravity disc 29 forming a central overflow outlet 30 from the separation chamber to the outlet chamber 26.
  • a stationary inlet pipe 31 opening in the receiving chamber 24 extends centrally into the rotor through the cover 8 and the annular partition 25.
  • a so called paring disc 32 is connected with the inlet pipe 31 and extends into the outlet chamber 26 to a level radially outside the overflow outlet 30 formed by the gravity disc 29.
  • a radially outer portion 33 of the frusto conical partition 19 extends to a level radially outside the openings of the outlet channels 27 in the separation chamber.
  • This radially outer portion 33 of the partition 19, as well as the portion of the same partition situated radially between the openings of the outlet channels 27 and the radially outer edges of the separation discs 13, have substantially smooth surfaces facing the separation chamber 9. These surfaces are thus free of entrainment members.
  • a so called sludge passage 34 which constitutes a prolongation radially outwardly of the space 22 and which is inclined relative to the rotor axis R in the same way as the inlet channels 23.
  • a so called sludge passage 34 Radially outside the sludge passage 34 there is an area 35 of the separation chamber 9 through which particles may move from the sludge passage 34 to the radially outermost part of the separation chamber.
  • the stack of separation discs 13 is surrounded by a space 36, which constitutes a part of the separation chamber 9 and through which liquid may flow from the interspaces between the separation discs 13 to and into the inlet openings of the outlet channels 27 in the partition 19.
  • the lower rotor body part 3 has at least one narrow radial groove 37, which forms a passage connecting the separation chamber radially outside the stack of separation discs 13 with a channel 17. This passage is intended for automatic drainage of the separation chamber when the rotor has been stopped after finished separation.
  • the centrifugal separator shown in the drawing operates in the following manner.
  • a liquid is conducted into the receiving chamber 24 through the inlet pipe 31, in which liquid there are suspended particles which are lighter than the liquid as well as particles which are heavier than the liquid.
  • the liquid flows further on through the inlet channels 23, in which it is entrained totally in the rotation of the rotor. Owing to the rotation of the liquid and the inclination of the inlet channels 23 relative to the axis R an effective pre-separation of the suspended particles is obtained while the liquid flows through the inlet channels.
  • suspended light particles will within the inlet channels 23 approach and be concentrated in a layer closest to the partition 19, whereas suspended heavy particles will approach and be concentrated in a layer closest to the adjacent surfaces of the centre part 5.
  • the reduced rotational speed of part of the liquid in the space 22 causes a counter pressure to come up for radially outwardly directed liquid flow through the space 22.
  • the space 22 will form a kind of counter pressure chamber.
  • Liquid having entered the distribution channels 21 flows further on into the interspaces between the separation discs 13. Between the separation discs the suspended light particles are separated from the liquid and move towards the rotor axis R. At a radial level somewhere in the interspace between the separation discs 13 there is formed during the rotor operation an interface layer between a so called light phase, which consists mainly of separated light particles, and liquid having been freed from such light particles.
  • the light phase may, if the light particles are constituted by oil or these oil particles or drops coalesce at a certain concentration, be constituted by a continuous phase of a liquid having a smaller density than the liquid having been freed from light particles.
  • the light phase may be constituted by a concentrated suspension of light particles in liquid, e.g.
  • the light phase thanks to the centrifugal force is gradually freed from residuals of the original carrying liquid as the light phase approaches the flow space 15 radially inside the separation discs 13.
  • the light phase contains in the flow space 15 a minimum of the original carrying liquid and flows from here out of the rotor through the channels 16 and 17 and the overflow outlet 18.
  • Liquid having been freed from suspended light particles leaves the interspaces between the separation discs 13 radially outwardly and flows through the area 36 of separation chamber 9 to and into the outlet channels 27.
  • the liquid As long as the liquid is present between the separation discs 13 it rotates around the axis R of the rotor at substantially the same angular speed as the rotor, but in the area 36 lacking entirely entrainment members the liquid will rotate at a smaller angular speed than the rotor. Thus, the liquid in this area will move both axially towards the outlet channels 27 and around the stack of separation discs.
  • the area in which liquid flows relative to the rotor in the circumferential direction of the latter after it has left the interspaces between the separation discs 13 comprises both the space around the stack of separation discs itself - along the whole of the axial extension of the stack - and the annular space which is situated immediately outside the openings of the outlets 27 and is limited by the radially outermost portion 33 of the partition 19.
  • the area 35 of the separation chamber 9, through which pre-separated heavy particles move from the sludge passage 34 to the radially outermost part of the separatioan chamber 9, is situated totally outside the just mentioned area, in which liquid flows from the interspaces between the separation discs to and into the outlet channels 27. Thereby, there is no risk for preseparated heavy particles to be entrained by the liquid into the outlet channels 27.
  • the liquid in this area will create a flow resistance to liquid being on its way in a direction away from the rotor axis towards the outlet channels 27.
  • the liquid column which to a large part consists of separated light phase and which is present between the area 36 and the overflow outlet 18, may be comparatively high, i.e. may have a comparatively large radial extension. Even if the liquid in the area 36 had rotated at the same speed as the rotor, said liquid column would by necessity have been higher, i.e.
  • the surfaces of the partition 19 facing the separation chamber are smooth, so that they will not to any substantial degree be able to act entraining on liquid in the area 36.
  • the groove 37 in the lower rotor body part 3 is so narrow that it will not influence the liquid flow in the area 36.

Landscapes

  • Centrifugal Separators (AREA)

Claims (12)

  1. Zentrifuge zum Befreien einer Flüssigkeit von leichten Schwebeteilchen, die eine kleinere Dichte haben als die Flüssigkeit, und schweren Schwebeteilchen, die eine größere Dichte haben als die Flüssigkeit, wobei die Zentrifuge einen Rotor aufweist, der zur Drehung um eine sich durch den Rotor erstreckende Mittelachse (R) angeordnet ist und in dem
    ein Rotorkörper (3 - 5), der eine erste Endwand (10) und eine zweite Endwand (12) aufweist, die jeweils axial auf einer Seite einer die Rotorachse (R) umgebenden Trennkammer angeordnet sind, einen Mitteleinlaß (24) für die Flüssigkeit bildet, die die leichten und schweren Schwebeteilchen enthält, sowie einen ersten mittleren Auslaß (26) durch die erste Endwand für die von den leichten und schweren Teilchen befreite Flüssigkeit und einen zweiten mittleren Auslaß (18) für eine leichte Flüssigkeitsphase, die die abgetrennten leichten Teilchen enthält,
    ein Stapel von konischen Trennscheiben (13) in der Trennkammer (9) auf eine solche Weise angeordnet ist, daß die Trennscheiben (13), die Bodenabschnitte und Spitzenabschnitte haben und beabstandet voneinander angeordnet sind, koaxial mit dem Rotor angeordnet sind, wobei ihre Spitzenabschnitte der ersten Endwand (10) zugewandt sind,
    jeder von mehreren Einlaßkanälen (23), die um die Achse (R) herum verteilt sind und den mittleren Einlaß (24) des Rotorkörpers mit der Trennkammer (9) verbinden, eine Neigung in Bezug auf die Achse (R) in derselben Richtung hat wie eine Generatrix jeder der konischen Trennscheiben (13),
    die Trennscheiben (13) mehrere Reihen von ausgerichteten Löchern aufweisen, die mehrere parallele Verteilungskanäle (21) durch den Stapel bilden, die mit den Zwischenräumen zwischen den Trennscheiben (13) in Verbindung stehen und an ihren Enden, die der ersten Endwand (10) am nächsten sind, mit den Einlaßkanälen (23) in Verbindung stehen, und
    jeder einer Anzahl von Auslaßkanälen (27), die um die Rotorachse (R) herum verteilt und für die Flüssigkeit vorgesehen sind, die von den leichten und schweren Teilchen befreit worden ist, eine Kanalöffnung in der Trennkammer (9) in der Nähe der ersten Endwand (10) hat, die sich von dieser Kanalöffnung zur Rotorachse (R) hin öffnet,
    dadurch gekennzeichnet, daß
    sich die Einlaßkanäle (23) in eine Gegendruckkammer (22) öffnen, die sich um die Rotorachse (R) herum erstreckt und axial durch Kammerwände begrenzt ist, die im wesentlichen frei sind von Rotationsmitreißelementen, so daß sich die Flüssigkeit in der Gegendruckkammer (22) bei einer Winkelgeschwindigkeit drehen kann, die kleiner ist als diejenige des Rotorkörpers (3 - 5),
    die Gegendruckkammer (22) einen ersten Abschnitt hat, der mit den Verteilungskanälen (21) in Verbindung steht, und einen zweiten Abschnitt, der sich radial außerhalb des ersten Abschnittes befindet und mit mindestens einem Schlammdurchgang (34) verbunden ist, und
    der Schlammdurchgang (34) mit der Trennkammer (9) in einem ihrer Teile in Verbindung steht, der so angeordnet ist, daß sich abgetrennte schwere Teilchen vom Schlammdurchgang (34) radial nach außen in die Trennkammer (9) durch einen Bereich (35) bewegen können, der sich axial und/oder radial außerhalb eines Strömungsraumes (36) befindet, der den Trennscheibenstapel (13) umgibt, und durch den die von den leichten Schwebeteilchen befreite Flüssigkeit auf ihrem Weg von den Zwischenräumen zwischen den Trennscheiben (13) zu den Öffnungen der Auslaßkanäle (27) strömen muß.
  2. Zentrifuge nach Anspruch 1, wobei sich der Schlammdurchgang (34) in die Trennkammer (9) an einem Ort radial außerhalb des Trennscheibenstapels (13) öffnet.
  3. Zentrifuge nach Anspruch 1 oder 2, wobei sich der Schlammdurchgang (34) in die Trennkammer (9) an einem Ort radial außerhalb der Kanalöffnungen öffnet.
  4. Zentrifuge nach einem der vorangegangenen Ansprüche, wobei der Schlammdurchgang (34) eine Fortführung radial nach außen aus der Gegendruckkammer (22) bildet und, wie die letztere auch, im wesentlichen frei ist von Rotationsmitreißelementen.
  5. Zentrifuge nach einem der vorangegangenen Ansprüche, wobei zwischen der ersten Endwand (10) und dem Trennscheibenstapel (13) eine konische Unterteilung (19) angeordnet ist, wobei die Gegendruckkammer (22) durch die konische Unterteilung (19) und die erste Endwand (10) und zwischen ihnen gebildet wird.
  6. Zentrifuge nach Anspruch 5, wobei die konische Unterteilung (19) Durchgangsöffnungen (20) hat, durch die die Einlaßkanäle (23) mit den Verteilungskanälen (21) in Verbindung stehen.
  7. Zentrifuge nach Anspruch 5, wobei sich die konische Unterteilung (19) radial außerhalb des Trennscheibenstapels (13) erstreckt und auf einer ihrer Oberflächen im wesentlichen glatt ist, die axial dem Strömungsraum (36) zugewandt ist, der radial außerhalb des Trennscheibenstapels (13) liegt und diesen umgibt.
  8. Zentrifuge nach Anspruch 7, wobei die konische Unterteilung (19) die Auslaßkanäle (27) und ihre Kanalöffnungen in der Trennkammer (9) begrenzt.
  9. Zentrifuge nach einem der Ansprüche 5 bis 8, wobei sich ein Abschnitt (33) der konischen Unterteilung (19) über eine Strecke radial außerhalb der Kanalöffnungen in einen Bereich zwischen diesen und der ersten Endwand (10) erstreckt.
  10. Zentrifuge nach Anspruch 9, wobei der Abschnitt (33) der konischen Unterteilung (19) eine im wesentlichen glatte Oberfläche hat, die der Trennkammer (9) zugewandt ist.
  11. Zentrifuge nach einem der vorangegangenen Ansprüche, wobei sich der mittlere Einlaß (24) des Rotors für die zu behandelnde Flüssigkeit durch die erste Endwand (10) erstreckt.
  12. Zentrifuge nach einem der vorangegangenen Ansprüche, wobei sich der zweite Auslaß (18) des Rotorkörpers, der für die leichte Flüssigkeitsphase vorgesehen ist, durch die zweite Endwand (12) erstreckt.
EP96911131A 1995-04-18 1996-03-26 Zentrifugalabscheider Expired - Lifetime EP0824378B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9501393A SE504227C2 (sv) 1995-04-18 1995-04-18 Centrifugalseparator
SE9501393 1995-04-18
PCT/SE1996/000375 WO1996033021A1 (en) 1995-04-18 1996-03-26 Centrifugal separator

Publications (2)

Publication Number Publication Date
EP0824378A1 EP0824378A1 (de) 1998-02-25
EP0824378B1 true EP0824378B1 (de) 2001-05-30

Family

ID=20397967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96911131A Expired - Lifetime EP0824378B1 (de) 1995-04-18 1996-03-26 Zentrifugalabscheider

Country Status (7)

Country Link
US (1) US5941811A (de)
EP (1) EP0824378B1 (de)
JP (1) JP3960361B2 (de)
DE (1) DE69613121T2 (de)
ES (1) ES2159025T3 (de)
SE (1) SE504227C2 (de)
WO (1) WO1996033021A1 (de)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE514135C2 (sv) 1999-04-07 2001-01-08 Alfa Laval Ab Sätt och anordning för separera ett ytskikt av en vätskekropp
SE514134C2 (sv) 1999-04-07 2001-01-08 Alfa Laval Ab Separeringsanordning för rening av en vätska från däri suspenderade fasta- eller vätskeformiga partiklar, som är lättare och/eller tyngre än vätskan
DE102008008120A1 (de) * 2008-02-08 2009-08-20 Gea Westfalia Separator Gmbh Separatortrommel mit mehrteiligem Trommeldeckel
EP2529839B1 (de) 2009-07-10 2017-10-11 Alfa Laval Corporate AB Separator
CN103357518B (zh) * 2009-07-10 2016-06-01 阿尔法拉瓦尔股份有限公司 气体净化分离器
US8657909B2 (en) 2009-07-10 2014-02-25 Alfa Laval Corporate Ab Gas cleaning separator
US9056319B2 (en) 2009-07-10 2015-06-16 Alfa Laval Corporate Ab Gas cleaning separator
US8673038B2 (en) 2009-07-10 2014-03-18 Alfa Laval Corporate Ab Gas cleaning separator
US9061291B2 (en) 2009-07-10 2015-06-23 Alfa Laval Corporate Ab Gas cleaning separator
US8764869B2 (en) 2009-07-10 2014-07-01 Alfa Laval Corporate Ab Gas cleaning separator
US8657908B2 (en) 2009-07-10 2014-02-25 Alfa Laval Corporate Ab Gas cleaning separator
US8657913B2 (en) 2009-07-10 2014-02-25 Alfa Laval Corporate Ab Gas cleaning separator
US8679214B2 (en) 2009-07-10 2014-03-25 Alfa Laval Corporate Ab Gas cleaning separator
KR101627150B1 (ko) * 2014-11-21 2016-06-03 재단법인 한국조선해양기자재연구원 원심분리기
TWI586417B (zh) * 2016-04-08 2017-06-11 ren-hao Xiao Centrifugal oil and water separator

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1283343A (en) * 1917-08-31 1918-10-29 Laval Separator Co De Centrifugal separator.
DE460926C (de) * 1924-02-19 1928-06-09 Bergedorfer Eisenwerk Akt Ges Reinigungsschleuder mit Einsatztellern und einem bis an den Schlammraum reichenden Verteiler
US2478992A (en) * 1946-08-10 1949-08-16 Laval Separator Co De Centrifugal bowl
US2726808A (en) * 1951-04-23 1955-12-13 Sharples Corp Centrifugal separation
SE8703965D0 (sv) * 1987-10-13 1987-10-13 Alfa Laval Separation Ab Centrifugalseparator
US5676631A (en) * 1993-07-06 1997-10-14 Westfalia Separator Aktiengesellschaft Centrifuge drum for concentrating suspended solids

Also Published As

Publication number Publication date
ES2159025T3 (es) 2001-09-16
JP3960361B2 (ja) 2007-08-15
SE9501393D0 (sv) 1995-04-18
EP0824378A1 (de) 1998-02-25
DE69613121T2 (de) 2001-09-13
JPH11511059A (ja) 1999-09-28
SE9501393L (sv) 1996-10-19
DE69613121D1 (de) 2001-07-05
US5941811A (en) 1999-08-24
SE504227C2 (sv) 1996-12-09
WO1996033021A1 (en) 1996-10-24

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